Kirby's Adventure is absolutely brilliant. It has some of the most varied platformer gameplay of any game ever made, let alone on an early console like the NES.

Kirby's Adventure is absolutely brilliant. It has some of the most varied platformer gameplay of any game ever made, let alone on an early console like the NES. It has four quite fun minigames built in, counting the jumping minigame at the end of each level. There are pseudo-3D levels (the tower world), a boss fight where you fence with a knight, and IMO the most remarkable final boss fight I've ever played, where the game becomes a side-scrolling space shooter for the final section. Despite all this variety and the NES only having two action buttons, the controls are absolutely rock solid throughout. It's really a masterpiece of early video game design. Only takes about five hours to beat, but has more gameplay stuffed into those hours than most modern games made with teams of hundreds.